Monolithic Power Systems Inc. MP62170EK-1-LF-Z

Overview

MP62170EK-1-LF-Z from Monolithic Power Systems is a single-channel, active-low enable, current-limited power distribution switch with 1.5A continuous load capability, 75mΩ R_DS(ON), and 2.7V–5.5V input range. It integrates thermal shutdown, under-voltage lockout, reverse current blocking, and an open-drain FLAG output with 8ms deglitching-designed for USB power distribution and hot-swap protection in portable electronics.

For engineers reviewing the MP62170EK-1-LF-Z datasheet, MP62170EK-1-LF-Z pinout, MP62170EK-1-LF-Z application, or MP62170EK-1-LF-Z equivalent, key selection criteria include guaranteed 1.5A current limit accuracy, active-low EN logic compatibility with legacy PMICs, MSOP8 footprint constraints, and FLAG timing behavior under transient overloads.

Technical Context

The MP62170EK-1-LF-Z implements a thermally protected N-channel MOSFET switch with internal current-sense amplifier and charge-pump gate driver. Its constant-current limiting activates at ≥2.3A (typical trip), transitioning to thermal shutdown only if sustained overload raises junction temperature beyond 140°C.

It features a dedicated open-drain FLAG pin that asserts low after 8ms deglitched detection of overcurrent or UVLO, with no glitch during power-up. The device supports reverse current blocking and maintains <1µA shutdown current while operating across –20°C to +85°C ambient.

Key Specifications

Pinout & Package

MP62170EK-1-LF-Z is housed in an 8-pin MSOP package (3.0mm × 4.9mm, 0.65mm pitch) with exposed thermal pad omitted per datasheet revision 0.9. Pin numbering follows JEDEC MO-187 variation AA standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-limited power distribution switch applications.

Compared with TPL7407LPWPR and TPS22965DRLR, MP62170EK-1-LF-Z delivers integrated fault management (thermal, UVLO, deglitched FLAG) in a compact MSOP8, making it uniquely suitable for space-constrained USB and portable applications requiring autonomous protection.

Availability

MP62170EK-1-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC card hot-swap, and smartphone peripheral power applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.

Supply support for MP62170EK-1-LF-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan.

The MP62170/MP62171 product line targets compact, intelligent power distribution in portable and interface-sensitive systems-emphasizing autonomous fault handling, minimal external components, and seamless integration with USB and hot-swap architectures.

FAQ

What is the function of the FLAG pin, and how does its deglitching work?

The FLAG pin is an open-drain output that goes low when overcurrent or under-voltage is detected. Its internal 8ms deglitch circuit ignores transients shorter than 8ms, ensuring only sustained faults trigger the flag-eliminating false reports during normal load switching or input ripple.

Can MP62170EK-1-LF-Z be used with 3.3V input supplies?

Yes. The device operates across 2.7V–5.5V, making it fully compatible with 3.3V rails. At 3.3V input, typical R_DS(ON) remains ≤130mΩ (over temperature), supporting up to 1.5A with ≤200mV dropout-sufficient for most low-voltage peripheral switching.

Does MP62170EK-1-LF-Z support reverse current flow from OUT to IN?

Yes. The device incorporates reverse current blocking, preventing current flow from OUT to IN when disabled or during input undervoltage. This protects upstream sources like batteries or shared VBUS rails from backfeeding during fault or standby conditions.

How does thermal shutdown recovery work?

Upon reaching 140°C junction temperature, the device shuts off the internal FET. Recovery occurs automatically once the die cools to approximately 120°C due to built-in 20°C hysteresis-no external reset or power cycle is required.

Is an external capacitor required on the IN pin?

Yes. A minimum 10µF ceramic or tantalum capacitor between IN and GND is recommended to suppress input transients and improve immunity to short-circuit-induced ringing-critical for stable operation in noisy USB or battery-fed environments.

What is the maximum allowable power dissipation in MSOP8 package?

At TA = +25°C, the MSOP8 package supports 0.8W continuous power dissipation. Derating is required above +25°C per θ_JA = 150°C/W; exceeding this limit triggers thermal shutdown to prevent permanent damage.

How does the current-limiting behavior differ between fast shorts and gradual overloads?

For fast shorts, the device enters constant-current mode within microseconds at ~2.3A. For gradual overloads, it sustains up to 1.5A continuously, then transitions to constant-current only upon crossing the trip threshold-allowing safe operation below rated load without premature limiting.